There are a few potential causes.
Rv awning smells.
By the way this can also happen in new rv s.
Rv water smells like rotten eggs if your water smells like rotten eggs the odor usually is due to high levels of sulphur microbes and hydrogen sulfide gas found in the water tanks.
Hydrogen sulfide gas produces a strong and unpleasant rotten egg odor and taste.
When you think about the place the toilet s contents go it s not a pretty picture.
The problem happens because many people keep it rolled up giving it little exposure to the sun.
Spray the underside of your awning with a soap and water mixture and then roll it up let it sit for an hour.
Here are the most common reasons rv toilets retain an odor.
Regularly roll out your awning to check for any discoloration or smells.
Roll the awning back out rinse it off and let it dry.
Why does my rv smell like a sewer.
Which is the stinky smell of hydrogen sulfide effusing from your black tank which knocks you out each time you get into your rv.
But the cause of your rv s stinky problem could be due to tank damage.
Because water and moisture create mold mildew and dry rot.
While the biggest mold mildew and rot issues occur within the walls and floor of an rv it is also possible to find mold and mildew growing on the outside of your rv.
Remember that if you clean the awning you need to also clean completely its housing where it gets rolled in.
Just like putting away a wet tent rolling up a wet rv awning can lead to mold and all of the problems that go along with it dry rot a bad stink and eventually ruined fabric.
Precipitation and condensation leave it damp thus promoting fungal growth.
If the smell you experience is ongoing and not solely when people are using it.
Fortunately if the sun s out the drying out process should not take too long.
Mold on rv awnings is also another common occurrence.
Always give it ample time to dry before retracting it.
These things if left unchecked can quickly take over your tiny home on wheels leaving you with serious and costly problems.
Mildew is not as big of a problem as mold as it tends to be more on the surface of the awning and it is more easily cleaned up.
You spend about 5 minutes working on it and it comes out like a brand new dust free awni ng.
If you bought a used rv and everything seems to be going well until you walk into your rv and there it is that horrible sewer smell.
Wait for your rv awning to dry before rolling it up.
Do not use car products they can have some additives that will actually help the mold.